<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
            
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id"
                     @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                
                </div>
            </div>
            <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" 
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                    >{{innerItem.name}}</div>
                   
                </div>
            </div>
        </div>   
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState,mapMutations } from 'vuex'
export default ({
   name:'CityList',
   props:{
       cities:Object,
       hot:Array,
       letter:String
   },
   updated(){
       this.scroll.refresh();
   },
   computed:{
       ...mapState({
           currentCity:'city'
       })
   },
   methods:{
        ...mapMutations({
                changeCity:'changeCity'
            }),
       handleCityClick(city){
           this.changeCity(city)
           this.$router.push('/')
       }
      
   },
   watch:{
       letter(){
           if(this.letter){
               const element=this.$refs[this.letter][0];
               this.scroll.scrollToElement(element);
           }
       }
   },
   mounted(){//页面挂载完毕执行
       this.scroll=new Bscroll(this.$refs.wrapper,{
           click:true
       })
   }
   
})
</script>
<style lang="stylus" scoped>
@import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color:#ccc
        &:after 
            border-after:#ccc
    .border-bottom
        &:before
            border-color:#ccc
    .list
        overflow:hidden
        position:absolute
        top:1.58rem
        right :0
        left :0
        bottom:0

        .title
            line-height :.54rem
            background :#eee
            padding-left :.2rem
            color:#666
            font-size :.24rem
        .button-list
            padding:.1rem .6rem .1rem .1rem
            overflow:hidden
            .button-wrapper
                float :left
                width :33.33%
                .button
                    margin :0.1rem
                    padding :.1rem
                    text-align :center
                    border:.02rem solid #ccc
                    border-radius :.06rem
        .item-list
            .item
                line-height :.76rem
                padding-left :.2rem
</style>
